Nan in translation from geo to point coordinates in Map

MTM_OSS

import QtQuick 2.4
import QtQuick.Window 2.2
import QtPositioning 5.5
import QtLocation 5.6

Window {
width: 800; height: 600; visible: true;

property variant centerOfTheMap: QtPositioning.coordinate(48.0, 2.0);
property real widthDegrees: 5; property real heightDegrees: 5;

Map {
id: mainMap
anchors.centerIn: parent;
anchors.fill: parent;
plugin: Plugin { name: "osm" }
visibleRegion: QtPositioning.rectangle(centerOfTheMap, widthDegrees, heightDegrees);

Component.onCompleted: {
console.log("Component.onCompleted called");
var p=mainMap.fromCoordinate(centerOfTheMap);
console.log("rect left ", centerOfTheMap, p);
}
} // Map
}

The printout is:

qml: rect left 48° 0' 0.0" N, 2° 0' 0.0" E QPointF(nan, nan)

Any idea why, and how can it be solved ?
Thank you,
MTM

Pablo J. Rogina

@MTM_OSS your code worked fine under Linux/Qt 5.9.0
I've just created a new Qt Quick application in Qt Creator and pasted your code in main.qml. Map visible with most of France, and output as follows:

qml: Component.onCompleted called
qml: rect left  48° 0' 0.0" N, 2° 0' 0.0" E QPointF(-0.494444, 0.347614)
QGeoTileProviderOsm: Tileserver disabled at  QUrl("http://maps-redirect.qt.io/osm/5.8/satellite")
QGeoTileFetcherOsm: all providers resolved